ratingMsgColors = new Array(6);
barColors = new Array(6);

ratingMsgColors[0] = "#676767";
ratingMsgColors[1] = "#aa0033";
ratingMsgColors[2] = "#f5ac00";
ratingMsgColors[3] = "#6699cc";
ratingMsgColors[4] = "#008000";
ratingMsgColors[5] = "#676767";

barColors[0] = "#dddddd";
barColors[1] = "#aa0033";
barColors[2] = "#ffcc33";
barColors[3] = "#6699cc";
barColors[4] = "#008000";
barColors[5] = "#676767";

function CreateRatePasswdReq(pwd) {
	if (!isBrowserCompatible) {
		return;
	}

	if (!pwd)
		return false;
	passwd = pwd.value;
	var min_passwd_len = 6;
	if (passwd.length < min_passwd_len) {
		if (passwd.length > 0) {
			DrawBar(0);
		} else {
			ResetBar();
		}
	} else {
		rating = checkPasswdRate(passwd);
		DrawBar(rating);

	}
}
function getElement(name) {
	if (document.all) {
		return document.all(name);
	}
	return document.getElementById(name);
}

function DrawBar(rating) {
	var posbar = getElement('posBar');
	var negbar = getElement('negBar');
	var passwdRating = getElement('passwdRating');
	var barLength = getElement('passwdBar').width;
	if (rating >= 0 && rating <= 4) { // We successfully got a rating
		posbar.style.width = barLength / 4 * rating + "px";
		negbar.style.width = barLength / 4 * (4 - rating) + "px";
	} else {
		posbar.style.width = "0px";
		negbar.style.width = barLength + "px";
		rating = 5; // Not rated Rating
	}
	posbar.style.background = barColors[rating];
	passwdRating.innerHTML = "<font color='" + ratingMsgColors[rating] + "'>"
			+ ratingMsgs[rating] + "</font>";
}

// Resets the password strength bar back to its initial state without any
// message showing.
function ResetBar() {
	var posbar = getElement('posBar');
	var negbar = getElement('negBar');
	var passwdRating = getElement('passwdRating');
	var barLength = getElement('passwdBar').width;
	posbar.style.width = "0px";
	negbar.style.width = barLength + "px";
	passwdRating.innerHTML = "";
}
/* Checks Browser Compatibility */
var agt = navigator.userAgent.toLowerCase();
var is_op = (agt.indexOf("opera") != -1);
var is_ie = (agt.indexOf("msie") != -1) && document.all && !is_op;
var is_mac = (agt.indexOf("mac") != -1);
var is_gk = (agt.indexOf("gecko") != -1);
var is_sf = (agt.indexOf("safari") != -1);
function gff(str, pfx) {
	var i = str.indexOf(pfx);
	if (i != -1) {
		var v = parseFloat(str.substring(i + pfx.length));
		if (!isNaN(v)) {
			return v;
		}
	}
	return null;
}
function Compatible() {
	if (is_ie && !is_op && !is_mac) {
		var v = gff(agt, "msie ");
		if (v != null) {
			return (v >= 6.0);
		}
	}
	if (is_gk && !is_sf) {
		var v = gff(agt, "rv:");
		if (v != null) {
			return (v >= 1.4);
		} else {
			v = gff(agt, "galeon/");
			if (v != null) {
				return (v >= 1.3);
			}
		}
	}
	if (is_sf) {
		var v = gff(agt, "applewebkit/");
		if (v != null) {
			return (v >= 124);
		}
	}
	return false;
}

/* We also try to create an xmlhttp object to see if the browser supports it */
var isBrowserCompatible = Compatible();

function CharMode(iN) {
	if (iN >= 48 && iN <= 57)
		return 1;
	if (iN >= 65 && iN <= 90)
		return 2;
	if (iN >= 97 && iN <= 122)
		return 4;
	else
		return 8;
}

function bitTotal(num) {
	modes = 0;
	for (i = 0; i < 4; i++) {
		if (num & 1)
			modes++;
		num >>>= 1;
	}
	return modes;
}

function checkPasswdRate(sPW) {
	if (sPW.length <= 4)
		return 0;
	Modes = 0;
	for (i = 0; i < sPW.length; i++) {
		Modes |= CharMode(sPW.charCodeAt(i));
	}
	return bitTotal(Modes);
}